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The as-synthesized powder was heat treated at elevated temperatures for varying time to remove adsorbed impurities from the surface of the ZnO nanoparticles. Both the as-synthesized and heat treated powders were characterized using a variety of analytical techniques. The hexagonal wurtzite phase of the ZnO powder was revealed from x-ray diffraction measurements. A decrease in the x-ray diffraction density (Dx) and the bulk density (D) resulted in an increase in percentage porosity (%P) of as-synthesized and heat treated ZnO powders. The range of fuel to oxidant ratios used in the present work indicates that they had a strong influence on the grain size of ZnO powders. The average grain size estimated by using the Scherer formula indicated an approximate value of 6-21 nm for the as-synthesized and heat treated samples.<\/p>","DOI":"10.4018\/ijmmme.2012040104","type":"journal-article","created":{"date-parts":[[2012,5,16]],"date-time":"2012-05-16T09:58:51Z","timestamp":1337162331000},"page":"61-76","source":"Crossref","is-referenced-by-count":0,"title":["Synthesis and Characterization of Hexagonal Shaped Nanocrystalline Zinc Oxide Powders"],"prefix":"10.4018","volume":"2","author":[{"given":"M.","family":"Ahmad","sequence":"first","affiliation":[{"name":"B. Z. University, Multan, Pakistan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"E.","family":"Ahmed","sequence":"additional","affiliation":[{"name":"B. Z. University, Multan, Pakistan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"N. R.","family":"Khalid","sequence":"additional","affiliation":[{"name":"B. Z. 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